US1838739A - Machine for knitting pile fabrics - Google Patents

Description

Dec. 29, 1931. c. H. BREAITHWAITE l 1,838,739

MACHINE FOR' KNITTING PILE FABRICS 3 Sheets-Sheet Filed Dec. 13, 1928 an o v W m x S Q a m. w

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Dec. 29, 1931. c. H. BREAITHWAITE 1,838,739

MACHINE FOR KNITTING PILE FABRICS Filed Dec. 13, 1928 3 Sheets-Sheet 2 /22 2 P 2 2/ I L\;

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if 5 B Owbam @5MM Dec. 29, 1931. c. H. BREAITHWAITE MACHINE FOR KNITTING PILE FARICS Filed Dec. 13, 1928v 3 Sheets-Sheet 3 nnnnnnnnnnn l proveniente .to be vPatented Dec. 29, Y1931 cHAnLEs Hr BREAITHWAITE, oF J1111:]:1nlinintente; PENNSYLVANIA .'.MACHINE ronxnrraunerrtn FABRICS .l

. appuatibnmea December 13,"..1e2ar semina. $25,703.

The principal objects of the' presentinven- Vtion are, first, to effect yan economy in the use of pile yarn; second, to produce knitted plush `or .pile fabric with a. clean'ba;ck,'thatfis, a 5 back at which no part ofjthej pile' yarn' is visible; third, to produce a fabric which shall be free from streakssuch as `are, produced by the lugs bet-Ween Which" the fabric is passedV in dial knitting machines With which l I am familiar; andfourth, to provide a machine adapted .to accomplish the results above indicated. Y y

"To these'and other ends hereinafter stated or appearing the invention comprises the impresentlyl described and `finally claimed. 1 y In the followingdescription reference yv'i'll be made `tothe accompanyingfdravvings' forming part hereofand in which n Y lFigure lis a view partlyfin sectionand `'partly in elevation, more.` or less fdiagrammatic, illustrating a knitting machine embodying features ofthe invention. ,Fig.` 2 is a top or plan vievvof the same.

'Fig Sois af diagrammatic view to Whichreference willbe hereinafter made. n

Figs. l', 5,6 and/7 are detached highly diagrammatic views villustrative of theoperation ofthe machine. Y n

Fig. 8 isV an elevationalview illustrative of cuttery mechanism. g 'l Fig. 9Y is a transverse sectionalvievv ofthe same. u ,Fig. 10 isa upward. l y l Fig. '11 is angenlarged elevational view, of portions of the cutter.

Fig. 12 risa sectional view illustrating a `modiiiedform of cuttermechanisim and p "Figs 13 and 141 are diagrammatic views Vhereinafter referred to.

`Inthe machine about to .be described the cams do not rotate. i There is dial mechanism 1` and it includesv hooks 2 and acam 3. There is knitting cylinder mechanism and 'itincludes a "rotatable 1,needle carrying I cylinder #t and latchineedles, and af cam 6 forfthe latch needles. lowerrend', as shown, by Way vof a spider'B With the rotary element 1 of the dial mech`- plan view of thecutter looking Z is a shaft4 connected at lits V amsm. rllhis' shaft passes 1thro-ugh suitable bearingsl 9, '10 and 11' and isturnably mount- `ed'inthe jbearings.V At its upper endthe shaft T-fispprovdediwith atoothed Wheel 12 driven "ithroifgh shafts 413 and 14:, ,and toothed 'Wheels "15., .16 and l7`,fro'nifthe sha'ft 18,"Whicli bythe toothed tvheel 20 is 'driven 4from "the needle cylinder'l, inturnd-riven by toothed Wheel 2Oa 'fromf drive 'sh'aft'20?. i By these means the rotaryel'ementf the dial mechanism and G9 'ani-sm' are driven 'synchronously While-at the :same timelthe' knitted fabric can pass ibei' tween?the` two mechanisms UWithout contactfabric doesnot have'y to besheared and With- Mm put shearingl presents a "Well finished smooth L ace. f-Referring tofFig.` 10,'there are fixed and Y fparallel 'obliquely disposed spaced cutters 21.*.Theyareshovvn as provided on the face A of ablock 22 beveled off as at 23, Fig. 11. VThe V'faces of thev cutters are also beveledy off Ias at 24,130 rprovide clearance. 11A-support is providevdffor cooperation yvith the cutter/sj, and in W Figs. 8, 9 andll itis shown asa rod 25 hav- 80 ing apointe'd en`d126` and mounted in a holder 27 or,m ore accurately, ina groove providedf .in the holder'so as to exposel the top portion ofthe rod 25. The holder27is `made adjust- 1 able byv the slot and screw connection 28, 3 and the slide 29` in vvhich Worksv a shank "'30 connected with the block and .actedupon i by aspringfl vadjustable bythe thumb screW32. l vIn Fig/12 there is shownv a 4modied form of support, andv itconsistsiof a revoluble disk of Which the rim 33 runsunfder a roller 34 and underthe hook 2, otherwise Athe construction `is as has been describedin connection with Figs. 9 and 11. i 2B fforeldescribing themode of operation of 95 the "machine inV detail reference is madeto Fig. 3. v'-lhesame;operations. are repeatedin the Vmachine"shovvn four times so that a des'c'ription of one operation Will suice. l "In'thefollowing description, the assump- 10 tion is made that the machine is in operation.

In Fig. 3 the pile yarn P is laid onto the hooks alone at the point generally indicated by the arrow 35 which, in the revolution of the parts, is in advance of the point 36, at which the backing thread is laid onto the needles. Fig. 4 diagrammatically indicates the introduction of the pile thread. Fig. 5 shows that the needles are lowered, not far enough to throw off the old loops and raised, and at the saine time the hooks are drawn in toward the vertical central axis of the machine. Fig. 6 shows the result of these relative movements and illustrates that the pile thread is looped and held outside of and around the needles and in the hooks, thus establishing its position and tension, and Fig. 6 also illustrates that, after the completion of the above described operation on the pile thread, the back thread B has been laid onto t-lie needles, at point 36 Fig. 3, and that the back thread is not engaged by the hooks 2. Fig. 7 shows a needle descending further than it did in Fig. 5 and carrying pile thread P and back thread B in its closed eye and about to throw oit" the old or previously formed loops A, supported by the top of the cylinder 4. Fig. 7 also shows that loops of pile thread are on the hooks 2, which have been projected, ready to be cut and let the fabric descend through the cylinder 4. In Figs. 13 and 14, there is diagrammatically illustrated the fact that the pile needle loops P are directly on top of the backing needle loops B. Referring to Fig. l() the dotted line 39 indicates the path of the loops and shows that they travel somewhat crosswise of the cutters because the hooks and needles travel in a circle of which the arc is intercepted at the cutter. The described cutter in cooperation with the other parts of the machine is an important factor in the production of knitted plush having a smooth pile face although the loops are cut in the machine. Again, as has been said, the construction of the machine is such that the plush face is devoid of objectionable stripe effects.

It will be obvious to those skilled in the art to which the invention relates that modiiications may be made in details of construction and arrangement and matters of mere form without departing from tlie'spirit of the invention which is not limited to such matters or otherwise than the prior art and the appended claims may require.

I claim:

l. Iii a knitting machine the combination of rotating dial mechanism including hooks, a rotary knitting cylinder mechanism including latch needles, two circumferentially spaced means each adapted to introduce an individual thread, the means for introducing the pile thread being in advance of the means for introducing the backing thread, the cam means of said dial mechanism and the cam means of said knitting cylinder mechanism being stationary in respect to rotation and constructed and adapted to project the hooks at the iirst thread introducing means to receive loops of pile yarn, and to retract the hooks and lower and raise the needles between the two thread introducing means to arrange and hold the pile thread in properly looped arrangement, and to raise the needles at the second yarn introducing means to receive the backing thread and to project the hooks to position the pile thread for cutting and to lower the needles to throw ot previously formed loops supported on top ot' lthe needle cylinder, and loop cutting mechanism for the pile loops.

2. In a knitting machine the combination of rotating dial mechanism including hooks,

Va rotary knitting cylinder mechanism including latch needles, two circumferentially spaced means each adapted to introduce an individual thread, the means for introducing the pile thread being in advance of the means for introducing the backing thread, the cam means of said dial mechanism and the cam means of said knitting cylinder mechanism being stationary in respect to rotation and constructed and adapted to relatively move the needles and hooks to prearrange the pile thread loops before the introduction of any backing thread and to then knitv the two threads with pile loops on the hooks, and cutting mechanism for the pile loops.

3. In a knitting machine having cooperating cylinder needles and dial hooks mounted for rotary movement, a cutter for the loops of pile thread carried by the Shanks of the dial hooks, said cutter comprising a plurality of beveled teeth arranged approximately at right angles to the tangents to the circle of movement of the pile thread loops.

4. In a knitting machine having cooperating cylinder needles and dial hooks mounted for rotary movement, a frame, a cutter for the loops of pile thread carried by the shanks of the dial hooks, said cutter comprising a plurality of beveled teeth arranged approximately at right angles to the tangents to the circle of movement of the pile thread loops and a spring interposed between said cutter and said frame.

5. `In a knitting machine having Cooperating cylinder needles and dial hooks mounted for rotary movement, a frame, a cutter for the loops of pile thread carried by the Shanks of the dial hooks, said cutter comprising a plurality of beveled teeth arranged approximately at right angles to the tangents of the circle of movement of the pile thread loops, a spring interposed between said cutter and said frame and a support for the outer ends of the dial hooks during the cutting operation.

c and beveled away from the pointof entry of` `6. In a knitting machine having cooperating cylinder needles and dial hooks mounted for rotary movement, a frame, a cutter for the loops of pile thread carried by the Shanks of the dial hooks, said cutter comprising a plurality of beveled teeth arranged approximately at right angles to the tangents to the circle of movement of the pile thread loops, a spring interposed between said cutter and said frame and a pointed rod arranged be-V neath said cutter and forming a support for the outer ends of the dial hooks during the cutting operation.

7. In a knitting machine having cooperatingl cylinder needles and dial hooks mount ed for rotary movement, a cutter for the loops of pile thread carried by the shanks of the dial hooks, said cutter'comprising al plurality of beveled teeth arranged approximately atright angles to the tangente to the circle of movement of the pile thread loops the pile thread loops and a pointed rod arranged beneath said cutter and forming a support for the outer ends ofthe dial hooks during the cutting operation.

CHARLES H. BREAITHWAITE

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